WO2002068820A8 - Shape memory alloy actuator with improved temperature control - Google Patents

Shape memory alloy actuator with improved temperature control

Info

Publication number
WO2002068820A8
WO2002068820A8 PCT/US2002/005450 US0205450W WO02068820A8 WO 2002068820 A8 WO2002068820 A8 WO 2002068820A8 US 0205450 W US0205450 W US 0205450W WO 02068820 A8 WO02068820 A8 WO 02068820A8
Authority
WO
WIPO (PCT)
Prior art keywords
actuator
heat sink
wires
temperature control
sma
Prior art date
Application number
PCT/US2002/005450
Other languages
French (fr)
Other versions
WO2002068820A1 (en
Inventor
Behrens Peter E Von
Dylan M Fairbanks
Original Assignee
Nanomuscle Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nanomuscle Inc filed Critical Nanomuscle Inc
Priority to CA002439148A priority Critical patent/CA2439148A1/en
Priority to JP2002567700A priority patent/JP2004536249A/en
Priority to EP02728350A priority patent/EP1438503B1/en
Priority to KR10-2003-7011088A priority patent/KR20030085131A/en
Priority to MXPA03007620A priority patent/MXPA03007620A/en
Priority to DE60226160T priority patent/DE60226160T2/en
Publication of WO2002068820A1 publication Critical patent/WO2002068820A1/en
Publication of WO2002068820A8 publication Critical patent/WO2002068820A8/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
    • F03G7/06—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like
    • F03G7/061—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like characterised by the actuating element
    • F03G7/0614—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like characterised by the actuating element using shape memory elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
    • F03G7/06—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like
    • F03G7/065—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like using a shape memory element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2280/00—Materials; Properties thereof
    • F05B2280/50—Intrinsic material properties or characteristics
    • F05B2280/5006—Shape memory
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/08—Thermoplastics

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manipulator (AREA)
  • Micromachines (AREA)
  • Control Of Temperature (AREA)
  • Temperature-Responsive Valves (AREA)

Abstract

A SMA actuator (20) having rigid members (21-23) and SMA wires(212, 213), in which improved temperature control of the SMA wires of the actuator is provided by a heat sink, which may be the rigid members themselves, in close proximity to at least a central portion of the wires. Optionally, the heat sink is sized and placed such that the end portions of the wires where they are attached to the rigid members are not in close proximity to the heat sink. Where the heat sink is external, it optionally has a cooling element that acts passively as a heat sink during the heating cycle of the actuator and that acts as an active cooling element during the cooling cycle of the actuator. An SMA actuator, having a desired contraction limit and a power supply circuit, has a switch in the power supply circuit that is normally closed when the actuator is contracted to less than the desired contraction limit and is opened by the actuator reaching the desired contraction limit. This improved temperature control provides greater cooling of the SMA wires for a faster response and an extended working life of the actuator.
PCT/US2002/005450 2001-02-22 2002-02-21 Shape memory alloy actuator with improved temperature control WO2002068820A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CA002439148A CA2439148A1 (en) 2001-02-22 2002-02-21 Shape memory alloy actuator with improved temperature control
JP2002567700A JP2004536249A (en) 2001-02-22 2002-02-21 Shape memory alloy actuator with improved temperature controllability
EP02728350A EP1438503B1 (en) 2001-02-22 2002-02-21 Shape memory alloy actuator with improved temperature control
KR10-2003-7011088A KR20030085131A (en) 2001-02-22 2002-02-21 Shape memory alloy actuator with improved temperature control
MXPA03007620A MXPA03007620A (en) 2001-02-22 2002-02-21 Shape memory alloy actuator with improved temperature control.
DE60226160T DE60226160T2 (en) 2001-02-22 2002-02-21 MEMBRANE OF MEMORY METAL WITH IMPROVED TEMPERATURE CONTROL

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US27098501P 2001-02-22 2001-02-22
US60/270,985 2001-02-22
US10/080,640 US6981374B2 (en) 2001-02-22 2002-02-21 SMA actuator with improved temperature control
US10/080,640 2002-02-21

Publications (2)

Publication Number Publication Date
WO2002068820A1 WO2002068820A1 (en) 2002-09-06
WO2002068820A8 true WO2002068820A8 (en) 2004-06-03

Family

ID=26763751

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/005450 WO2002068820A1 (en) 2001-02-22 2002-02-21 Shape memory alloy actuator with improved temperature control

Country Status (10)

Country Link
US (1) US6981374B2 (en)
EP (1) EP1438503B1 (en)
JP (1) JP2004536249A (en)
KR (1) KR20030085131A (en)
CN (1) CN1298995C (en)
AT (1) ATE392551T1 (en)
CA (1) CA2439148A1 (en)
DE (1) DE60226160T2 (en)
MX (1) MXPA03007620A (en)
WO (1) WO2002068820A1 (en)

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WO2002068820A1 (en) 2002-09-06
ATE392551T1 (en) 2008-05-15
JP2004536249A (en) 2004-12-02
CN1571882A (en) 2005-01-26
DE60226160T2 (en) 2009-07-02
EP1438503B1 (en) 2008-04-16
US20020113499A1 (en) 2002-08-22
CN1298995C (en) 2007-02-07
MXPA03007620A (en) 2005-03-07
US6981374B2 (en) 2006-01-03
KR20030085131A (en) 2003-11-03
EP1438503A1 (en) 2004-07-21
DE60226160D1 (en) 2008-05-29
CA2439148A1 (en) 2002-09-06

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